Steam-boiler



(No Model() 2 Sheets-Sheet 1.

M. DE PUY.

\ STEAM BOILER.

W @Y wfg ATTOHNE YS.

(No Model.) 2 Sheets-Sheet 2.

M. DE PUY.

STEAM BOILER.

- No. 597,961. Patented Jem. 2551898.

W/TNESSES: Y :'NVENTOH A TTOHNE YS.

PATE-Nr muon.

MELVIN DE PUY, OF BUFFALO, NE'W YORK.

STEAM-BOI'LER.

SPECIFICATION forming part of Letters Patent N0. 597,961, dated January 25, 1898.

l Application filed September 23, 1897. Serial No. 652,713. (No model.)

.To all wiz/0m, it may concern;

Beit known that I, MELVIN DE PUY, of Buffalo, in the county of Erie and Siate of New York, have invented new and useful Improvements in Steam-Boilers, of which the following is a full, clear, and exact description.

This invention relates to steam-boilers of either the marine or1 stationary horizontal type; and the object is to provide a boiler of comparatively simple construction in which practically all of the heat in the fuel is utilized for heating the water, thus quickly generating steam, and in which there will he a free circulation of water.

I will describe a steam-boiler embodying my invention, and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical section on the line 1 1 of Fig. 2 of a boiler embodying my invention. Fig. 2 is a vertical section at right angles to Fig. 1. Fig. 8 is a horizontal section on the lineS'S of Fig. 1, and Fig. 4c is a horizontal section ou the line 4 4 of Fig. 1.

The shell of the boiler comprises two sections 1 2, each describing substantially onehalf the circumference of the shell. The upper section 1 is turned downward at the sides to form the outer walls of side water-legs 3. The inner walls of said side water-legs are attached at their upper ends to the lower section 2 of the shell. The lower section 2 is provided with transverse slots 5, providing communication between the interior of the shell and the side water-legs, and to gain sufficient strength for this lower section of the boiler, which would otherwise be weakened by cutting the slots therein, the said lower section is made of somewhat thicker metal than the upper section and' stay-bolts 6 connect the inner section between the slots with the outer walls of the waterlegs, and the walls of the water-legs are further braced by stay-bolts 7.

Communicating with the interior of the boiler is a central water-leg 8, the walls of which are suitably braced by bolts 9. This water -leg S communicates with the boiler through slots 10, and, as shown, it is made of a width substantially equal to the combined width of the two side water-legs. -These several water-legs extend substantially the whole llength of the boiler and are open at their ends, these open ends communicating with the rear water-leg 11 and a front water-leg 12. The spaces between the center water-leg and the side water-legs are employed as nre-boxes and are provided with the usual grate 13, and at the rear end these hre-boxes communicate with the tluebox 14.

Arranged horizontally in the boiler are a number of iiue-tubes 15,the rear ends of which extend through the tine-sheet 16, and the front ends extend thro ugh the header 17. The space between the tubes 15 directly over the center water-leg is somewhat wider than the space between the other tubes. This waterspace over the center water-leg permits of a freer circulation of water over and through vsaid center water-leg than would be the casev were the -tubes arranged closely together. The ends of the side and center water-legs being open, it is obvious that the several water-legs practically form one continuous water-leg.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1.- A steam-boiler, comprising a shell, side water-legs communicating at the top with the interior of the shell through transverse slots through the shell, and a center water-leg also communicating with the interior of the shell, the several water-legs extending the whole length of the boiler-shell, and the center water-leg having a width substantially equal to the combined width of the side legs, substantially as specified.

2. A steam-boiler, comprising a shell, side waterlegs having communication therewith, and stay-rods extended between the outer walls of the side legs and the lower portion of the shell, substantially as specified.

3. A steam-boiler, comprising ashell, side water-legs having communication therewith, the lower portion of the shell being of thicker metal than the upper portion, and stay-rods IOO extended between the outer Wall of the side ter-leg, and stay-rods connecting the opposite legs and the lower section of the shell, sub- Walls thereof, substantially as specified.

stantially as speeied. r 4. A steam-boiler, comprising L shell, side MELVIN DE PUX' Water-legs communicating with the interior Vtnesses: of Jhe shell, stay-rods connecting Iche oppo- JOHN R. LONG, site walls of the Side water-legs, L center Wa- JOHN J. SUNKES. 

